References

Alsan, Marcella. 2015. “The Effect of the Tsetse Fly on African Development.” American Economic Review 105 (1): 382–410.
Bocinsky, R. Kyle. 2016. FedData: Functions to Automate Downloading Geospatial Data Available from Several Federated Data Sources. http://CRAN.R-project.org/package=FedData.
Chen, Bowen. 2020. CropScapeR: Access Cropland Data Layer Data via the ’CropScape’ Web Service.
Hart, Edmund M., and Kendon Bell. 2015. Prism: Download Data from the Oregon Prism Project. https://doi.org/10.5281/zenodo.33663.
Hufkens, Koen, David Basler, Tom Milliman, Eli K. Melaas, and Andrew D. Richardson. 2018. “An Integrated Phenology Modelling Framework in r: Modelling Vegetation Phenology with phenor.” Methods in Ecology & Evolution 9: 1–10. http://onlinelibrary.wiley.com/doi/10.1111/2041-210X.12970/full.
Lindblad, Brad. 2020. tidyUSDA: A Minimal Tool Set for Gathering USDA Quick Stat Data for Analysis and Visualization. https://bradlindblad.github.io/tidyUSDA/.
Nunn, Nathan. 2008. “The Long-Term Effects of Africa’s Slave Trades.” The Quarterly Journal of Economics 123 (1): 139–76.
Nunn, Nathan, and Diego Puga. 2012. “Ruggedness: The Blessing of Bad Geography in Africa.” Review of Economics and Statistics 94 (1): 20–36.
Pebesma, Edzer. 2018. “Simple Features for r: Standardized Support for Spatial Vector Data.” R Journal 10 (1).
———. 2020. Stars: Spatiotemporal Arrays, Raster and Vector Data Cubes. https://CRAN.R-project.org/package=stars.
Wickham, Hadley, and Jay Hesselberth. 2020. Pkgdown: Make Static HTML Documentation for a Package. https://CRAN.R-project.org/package=pkgdown.
Xie, Yihui. 2016. Bookdown: Authoring Books and Technical Documents with R Markdown. Boca Raton, Florida: Chapman; Hall/CRC. https://github.com/rstudio/bookdown.
Xie, Yihui, Alison Presmanes Hill, and Amber Thomas. 2017. Blogdown: Creating Websites with R Markdown. Boca Raton, Florida: Chapman; Hall/CRC. https://github.com/rstudio/blogdown.